3.1.17 implosion

Thank you @nikeo for this update. I forgot to refresh all my cached pages after the update and the result was that my site looked like a car crash until I went back in and re-cached. Just saying in case any other newbie gets scared witless by it.

Looking forward to .18 which looks poised to descend – with some meaty enhancements. I will remember to re-cache next time.